By concealing the real prices and cost of transaction, says one U.S. trade representati, ve, the various forms of barter may conceal and help perpetuate economic inefficiencies in the marketplace.

• 以为美国贸易代表说，通过隐瞒真实价格和交易成本，各种各样的易货贸易可能会掩盖市场上的经济低效并使其长期存在。